Lifting implement.



"-1. C. RICHARDSON.

YLING IMPLEMENT.

APPLICATION FILED JUNE 24.1911.

Patented June 18. i912.

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Houma i) 'lirake shoeel TE Ftll EDWIN C. RICHARDSON, OF GRAND RAPIDS, MICHIGAN'.

LIFTING IMPLEMENT.

Specification of Letters Patent.

Patented June il et. 15H2.

Applieaton filed .'lne 24. 1911. Serial No, 635,226.

To oli when; tt muy concern:

lle it known that l, Enwix C. Riemannson. a eitizen of the [nited States, residing at Grand Rapids, in the count)7 of 'lient and State `l' Michigan, have '.ivented certain new and useful improvements in Lifting implements,4 ot' which the following isla speeitication.

M v invention relates to improvements in appliances for raising` heavy packages to, or lowering,r them from different heightsntnd its ohjerts are: first, to provide an implement t'or raising and loweringl packages with which theartuating leverwill. travel with the elevating platform; second, to provide an implement for raising and lowering` packages that mayv lie readiliv1 moved from place to place with or without-its load, and, third,v to provide lan innilement of the kind named with which the raising,` elements ma)Y be disengaged and the elevator platform and its load ma)` he. lowered h v means of a friction brake. l attain these objects hy the mechanient illustrated in the accompanying draw' ing, in which-- a Figure l is a side elevation of the implement. Fight? is a front elevation of the same. Fig. 3 is a detailed view showing the relative position of the lever and pawls with the etandard. Fig. Llfis a plan o' the main platform and the elevating platform with the standard shown in section, and the elevating lever removed to .show the 'pesition of the lever that raises and lowers the platform. Fig. 5 is aseetional lplan of the standard showing the relative positionsof the elevating platform and lever. Fig. G is a Sectional elevation of the [langes of the standard on the' line a: :t: of Fig. 5 to diselose the position and action of the friction Fig. 'T Shows a side, and an edge view of the lever and eccentricsl with which the brake Shoes are operated.

This implement is eonstrneted with a standard A, mounted on a base l5 and having a Series of teeth or serrations L on the front surface upon which the points of the pawls E and E act' for raising' and lowering the elevator platform C. This platform is made with the body C and with two arms C. one of which is situated on each side ot' the Standard A and a roller' is placed between them at H to travel upon the back surface 'of the standard, and two similar rollers, ll,'to travel upon the yplain surfaces a.' on the front'surfaeeof tl1e. "standa1d tot' 'lessen friction to the minimum when hantiling?r heav)Y loads.

The appliant-es for aetuatingthe elevator platform t consists ot' a lever l) that is fnlerumed to the arms t" as at' um, see Figs. l. and and hasl a pawl ll fnlrrnmed to thin lever. as at e and another pawl lil fult-rumed to the end upon the pin e" to which the lever'itself is fnlernmed to the arms C. 'l`heee pawls havecounter weights c and respectivelv, in position -to throw and hold them, normally, in' engagement with the teeth n on the standard. t will he readily understood that if the lever l) is .raised npward. as indicated hy the upper set of dotted lines in Fig. il, the pawl l will be held in tirm engagement with the teeth a on the standard and the pawl E will lie carried upward with the lever to engage teeth higher up on the standard, and if the lever drawn downward as `indicated by the lower set of dott-ed lines in Fig. 3, the pawl E will he made to taigage the teeth on the standard and will act as the fulcrum over which the lever acts, aud the pawl E and the elevator platform C will he raised accordingly. I1" desiring' to lower the platform with the lever l) the operatt'n' draws tirst on the rod Z to relieve the pawl E and then raises the end ofthe lever, and when the lever has heen raised to the desired height he releases the pawl'll and allows it to engage the teeth on the standard when he draws on the -rod d and releases the. pawl 'E and lowers the lever to the desired distance, and continues this action until the platform has been lowered to the desired position.

d and (ZM are rings on the rods c/ and al respectively. with which to conveniently handle. them.

To facilitate the handling` ot' the platform C l place a sheave L at the top of the standard A and pass' a cable or eord I over it, Securing' one end of said cable to the arm C of the platform C. and the other end to a weight L",y shown in dotted lines inside of theY tulle Z/n Fig. 2, which weight is designed to act as a eonnterpoise for the platform C, and will rise and lower as the platform lowers and rines. 'lVhen desiring to lower the platform C b v friction, pro- Yvide a brake consisting,- of two Shoes J.' See Figs. 5 and G, which are provided with a hole through'eaeh for the ret-option of the eecentrie wheels K, Shown in' solid lines upon the front shoe, land m dotted lines upon the back shoe, 'in Fig. 6, which eccentrics are mounted on a short shaft, Ji that passes through the arm C of th platform C, and 'the boss thereon, and hasv a lever l attached to its outer end by means of which said eccentrics may be actuated to force the shoes firmly against the inner surfaces of the flanges a of the standard A with sufficient force to 'govern the descent of the platform and its'load, perfectly, or to draw them Simultaneously away from said flanges to leave the platform free to be raised and lowered at the pleasure of the operator.

The platform B is provided with two wheels F near the back end, and with one adjustable wheel F at the front end. lt also has two legs b at the front end, and the lower end of the standard A extends down below the platform to the same plane as the lower endsof the legs b so that when handling a load the entire weight of the load may be made to rest upon thefloor or other supporting element. lf it is'desired to move the implement and its load, or the implement alone, the lever F is.- drawn down to practically the position indicated in Figs 2 and 4, when the `wheel F willloe forced under the platform and will raise the front end of the implement sufficiently to clear the legs h from the floor when the implement may be wheeled to any location desired. It

will he seen that the lever F has an offset that is fulcrnmed to the swiveled bearing G which is pivotally supported in the arm B', projecting from the 'end `of the platform B.

b represents series of serrations formed 'on the ends of the arms of the platform B for'the purpose of forming a holding eley ment for the edges of packages when loading them upon the platform Ciand L rep resents a strengthening oar across between the twoV arms of the platform B. The end of the lever D next lto the standard A is bifurcated, as shown at D', for the reception of the pawls E and lllgbetwecu the arms D that forms this end/ofthe lever.

when moving the implement from place to place in a building ori other place, the lever F may be carried from side to side, as indicated by the arrows and dotted lines in Fig. 4, to guide the platformin any direction desired.

1n the construction of the shoes J I form a protecting wing j to one side of each shoe, of sulicient length or depth to just cover the thickness of the body of the shoe, as shown in Fig. 5. f

'What- I claim as new, and desire to secure by Letters Patent of the United States,

l. In an implement for raising and lowering packages, a supporting platform, a standard supported on said platform and having-.upwardly inclined teeth on one surface, a Avertically movable platform having armsrx projecting by said standard, wheels journaled between said arms to travel uponV face., a vertically movable platform`having arms to project by thestandard, an ant-ifriction roller to travel on one surface of the standard and two antifriction rollers to travel on the other surface of the standard one on each side of the teeth, a lever pivotally mounted between the arms concentric with the wheels, a pawl mounted on said lever concentric with the wheels, a pawl pivotally mounted on the lever some dis tance from the wheels, counter weights to hold said pawls normally in engagementwith the teeth, rods for manipulating said pawls to disengage them fromthe teeth, said pawls so arranged that when `the free end ofthe lever is raised one pawl will engage the teeth and the other pawl will be raised. and when the free end ofthe lever is carried downward the other pawl will engage the teeth and the first pawl and the platform will raised, carrying the lever and platformtogether.

Signed at Grand Rapids Michigan .lune 20th 1911.

EDWIN C. RICHARDSON ln presenceof- MICHAEL CoLLmoN, ITHIEL J. CILLEY.

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